Author: Kiyomichi, A.
Paper Title Page
FRXA01 Full Energy On-Demand Beam Injection from SACLA into the SPring-8 Storage Ring 4508
 
  • H. Maesaka, T. Fukui, T. Hara, T. Hiraiwa, T. Inagaki, E. Iwai, H. Tanaka, K. Togawa
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • H. Dewa, T. Fujita, K. Fukami, N. Hosoda, A. Kiyomichi, M. Masaki, S. Matsubara, T. Ohshima, M. Oishi, K. Soutome, S. Takano, T. Watanabe
    JASRI/SPring-8, Hyogo-ken, Japan
  • C. Kondo
    JASRI, Hyogo, Japan
 
  The beam in­jec­tor for the SPring-8 stor­age ring (SR) was switched from the booster syn­chro­tron to the SACLA linac, a dri­ver for X-ray free-elec­tron laser (XFEL). The low-emit­tance beam from SACLA (~100 pm rad, 8 GeV) is de­liv­ered to the SR through a 600m-long beam trans­port line. This low-emit­tance beam can be ap­plied to the new low-emit­tance stor­age ring after the SPring-8 up­grade planed in the com­ing years. The shut­down of the booster syn­chro­tron and 1-GeV linac saves en­ergy con­sump­tion and op­er­a­tion cost. To pro­vide the elec­tron beam in­jected to the SR on de­mand for the top-up in­jec­tion dur­ing the XFEL op­er­a­tion, the SACLA linac must be syn­chro­nized to the de­sired bucket of the SR, the beam en­ergy and route must be switched shot-to-shot, and the XFEL per­for­mance must not be de­graded. We de­vel­oped a pre­cise syn­chro­niza­tion sys­tem, on-de­mand beam route and pa­ra­me­ter switch­ing sys­tem, a pulsed mag­net for the switch­yard, iso­lated bunch pu­rifi­ca­tion sys­tem, etc. In this pre­sen­ta­tion, we will show the de­sign and per­for­mance of each com­po­nent for the beam in­jec­tion and the re­sults from beam com­mis­sion­ing of the ac­cel­er­a­tor and trans­port line.  
slides icon Slides FRXA01 [3.446 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-FRXA01  
About • paper received ※ 19 May 2021       paper accepted ※ 01 July 2021       issue date ※ 31 August 2021  
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